Steam-boiler.



No. 827,027. PATENTED JULY 24,1906. 0. D. MAR'LOWE 6a H. T. IRVING.

STEAM BOILER. APPLICATION FILED APB.4.1908.I

4% A WMM Wwtnmaza UNITED STATES PATENT OFFICE.

CLINTON D; MARLOW E AND HARLEY T. IRVING, OF JOHNSTOWN, PENNSYLVANIA.

STEAM-BQILER.

Specification of Letters Patent. Application filed April 4, 1906. Serial No. 309.808-

Patented July 24, 1906.

, have invented certain new and useful Improvements in Steam-Boilers, of which the ollowing is a specification, reference being. e accompanying drawings;

had therein to t Our invention relates, to steam-boilers, and more particularly to that class having tubes or flues therein, such as are used on locomotives and the like, one of the objects being to provide means for permitting the expansion of the boiler-tubes, and particularly of the tube-sheet nearest the fire-box, where the intense heat causes the same to materially expand, especially at and near the center, when the boiler is fired up, and to afford means for the corresponding contraction when the .fire is withdrawn or permitted to die out.

It is a fact well-known to firemen and engineers that when the fire-box is opened to replenish the fuel the draft created immediately cools the tube-sheets and tubes, causing contraction, and that as soon as the door of the fire-box is closed the sheets and tubes again expand. It is to provide against damage and mjury to the boiler by this and other contractions and expansions caused by the heating and cooling of the boiler that our invention is designed, as by its use in tubehoilers substantial provision for material expansionand contraction of tube-sheets and" tubes is made, as will be obvious from the construction and o eration of parts herein after in'the specifil particularly described. I

An additional object of the invention is to provide means which while ermitting of expansion and contraction of the tube-sheets and tubes will effectually prevent the discharge or esca e of water or steam at the e' tubes are connected with 'A still further object is to provide a water and steam tight slidably and adjustably mounted connection or joint between the tube-sheet and the tubes to permit .ofslight movement of the tube-sheet in contract ng or ex anding upon the tubes. 4 0t or objects and advantages of our in vention, as well as the structural features by ation and claims more means of which these objects are attained, will be made clear by an examination of the specification, taken in connection with the accompanying drawings, in which the same reference numerals indicate corresponding portions throughout, and in which Figure 1 is a longitudinal sectional view of a portion of a boiler and showing the application of our invention. Fig. 2 is a view of a portion of'a flue-sheet with our device in operative position, and Fig. 3 is a detail detached perspective view of the several parts shown in alinement.

1 designates the tube-sheet of a boiler nearest the fire-box, 2 the tube-sheet at the other end of the boiler, and 3 one of the tubes or fiues connecting said sheets. Each tubesheet opening in the tube-sheet 2 is provided with female threads, which are adapted to receive the exterior male threads 4 on a sleeve or thimble 5, having its outer end provided with interior female threads and having its inner end provided with an integrally-formed interior annular projection or rim 6, forming a shoulder 7. The interior circumference of the sleeve or thimble 5 at the point of the integrally-formed annular rim or projection 6 is of a diameter sufficient to fit closely and snugl upon the tube 3, and the outer end of said thimble or sleeve is provided with an annular projecting flange 8, which rests against the outer side of theflue-gheet 2.

9 designates a hollow gland or cap provided with exterior male threads adapted to be received by the female threads in the sleeve 5.

This gland or cap has a projecting rim 10 in the shape of a hexagon for the reception of an screwed into the outer end of the sleeve or thimble 5. The thickness of the threaded portion of said gland is the same as the depth ofthe annular rojecting rim 6, so that when said cap is in p ace, as shown in Fig. 1, an annular space or recess 11 is left: between the interior of the sleeve 5 and the-tubeS, which space or recess is provided with" any suitable packing 12, such as vulcanized asbestos and the like.

' The end of the tube 3 which passes through the sleeve 5, and. consequently the tube-sheet 2, is provided with exterior threads for the purpose of receiving a stop-nut 13, which screws thereon.

ordinary nut-wrench whereby it may be 1 TDD with our invention must necessarily be some.

what less in circumference than the tubeopenings in flue-sheet 2 in order to leave sufficient space for the sleeve or thimble 5.

In operation the sleeve or thimble {sis screwed into the opening through the fiue sheet until the annular flange 8 is brought against the outer edge of said sheet The tube is then passed through the sleeve, the packing pressed into the recess 13, the gland orcap 9 screwed into position to bear against and press the packing firmly into said recess to completelyfill the same, and then the staynut 13 is screwed upon the end of said flue, as shown, to a point sufficiently near the outer end of the gland or ca 9 to admit of the necessary expansion of t e flue-sheet 1, which will occur'after the fire is started in the fire-box and the water in the boiler becomes heated to the desired degree.

It will be observed that the land or cap may be gradually tightened as t e packing in the recess 12 wears away, so that said packing is kept continuously compact to render a perfectly water and steam tight joint.

It is thought that from the foregoin description, taken-in connection with the rawings, the construction and o eration of our invention will be obviousand fiiirther explanatioii is not deemed necessa While we have illustrate and described a preferred embodiment of our invention, it is obvious that various modifications of form and arrangement of parts can be made by the skilled operator or mechanic,which modifieations and arrangements come well within 'the scope and spirit of our invention as disclosed and claimed and we do not, therefore,

desire'to be limited to the exact construction and arrangement shown.

Having thus described our said invention,

integral with the sleeve and surroundin the tube, packing arranged in the recess an surrounding and contacting the tube, a land removably and 'adjustably mounte' other end of the sleeve and adapted to en gigs and compress the packing, and ad'ust a I e means for limiting the travel 0 the sleeve on the tube.

2. In a steam-boiler, thecombination, with 4 a tube-sheet and a tube, of a sleeve adjustably mounted in an opening in the sheet and in theslidable on the tube, said sleeve having an inwardly-projecting annular 'flan e formed integral with one end thereof and c osing one end of a longitudinal annular packing-recess within the sleeve, packing arranged in the recess and adapted to surround and contact the tube a gland adjustably and removably mounted in one end of the sleeve and adapted to engage and compress the packing, and

adjustable means for limiting the travel-of the sleeve on the tube.

3[ In a steam-boiler, the combination, with a tube-sheet and a tube, of a threaded sleeve 'passingthrough an o enin in the tube-sheet and slidably mounte on t e tube, said sleeve having alongitudinal packing-recess therein an annular d ange formed'integral with an adapted to close one end of the sleeve around the tube, packing arranged in the recess and adapted to surround an contact the tube, a screw-gland adapted. to close the other end of the sleeve and to engage and compress the packing, and adjustable means for limiting the travel of the sleeve on thetube 4. In a steam-boiler, the combination, with a tube-sheet and a tube, of a threaded sleeve .slidabl y mounted on the tube, said sleeve having ,an annular packing-recess therein packing within the recess, a screw-glen adapted to screw into the sleeve and gradually compress the packing and a stay-nut onthe end of the-tube.

5. In a steam-boiler, the combination, with a tube-sheet and a tube, of a threaded sleeve adapted to screw into a tube-opening n the sheet, said sleeve having an annular rim reducing the circumference of one end thereof a screw-gland screwing into the other end 0 the sleeve leavin a pee g-space between the rim and the g and, means for limiting the travel of the gland into the sleeve, and a sta nut ada ted to, screw onto the end'of tile tube an enga ejthe gland.

6. The comb sheet and a tube, of an exteriorly threaded sleeve encircling the tube and adapted to mation, with a boiler tube IIO screw into an opening in the sheet, saidsleeve having a packing-recess therein, packing in the recess, means fol-closing one end of the sleeve to retain the packing, and means for closing the other end of the sleeve and compressing the packing.

7. The combination, with a boiler tube sheet and .a tube, of an exteriorly-threaded sleeve encircling the tubeand adapted to. screw into a threaded opening in the sheet, said sleeve having a packin -space therein, means for closing one end of time recess, and a screw-gland adapted to engage threads in the interior of the sleeve and limit the s ace. j

8. The combination, with a ho or tubesheet and a tube, of an extenorly-threaded' ,sleeve encircling the tube and adapted to,

screw into an opening in the sheet, said the expansion of the sheet.

ing in the recess, means for closing one end of the sleeve to retain the packing, means for closing the other end of the sleeve'and compressing the' packing, and a stay-nut screwed on the end of the tube and adapted to limit 9. In a steam-boiler, the combination, with a tube-sheet and .a tube, of a threaded sleeve adapted to screw into the sheet and receive the, tube, said sleeve having a packing-recess therein, packing arranged in the recess, means for closing one end of the sleeve, and a screwgland adapted to screw into the other end of the-sleeve and compress the packing.

10. In a steam-boiler,thecombination,with a tube-sheet and a tube, of a threaded sleeve adapted to screw into the sheet and receive thetube, said sleeve having a packing-recess therein,packing-arranged in the recess,means for-closing one endof the sleeve, a screwgland adapted to screw into the otherend of the sleeve andcompress the packing, and a stay-nut adapted to screw on the end of the tube to limit expansion of the sheet.

1 1. Ina steam-boiler,the combination,with

a tube-sheetand a tube, ofa threaded sleeve slidably mountedon the tube and adapted to screw into the tube-opening inithe sheet and receive the tube, saidsleeve havinga packingrecesstherein, packing arranged in the recess,

means for closing one end of the recess, a

screw-gland adapted to screw into the sleeve sleeve an close one end of the recess, and a stay-nut 'on the end of the tube and adapted to limit the travel of the sleeve on the tube.

13. In a steam-boiler,the combination ,with

a tube-sheet and a tube, of a threaded sleeve slidably mounted on the tube and removably and adjustablymounted in an opening in the tube-sheet, said sleeve having an annular recess therein, packing in the recess, means for closing one end of the recess, a screw-gland adapted to screw into the sleeve and close the other end of the recess andcompress the packing, and a stay-nut adjustably mounted on the end of the tube.

In testimony whereof we hereunto affix our. signatures 1n presence of two witnesses.

CLINTON D. MARLOWE. HARLEY T. IRVING.

Witnesses L. LANGwoRTHY, DAISY -L;-LovELEss. 

